397016278 has 4 divisors (see below), whose sum is σ = 595524420. Its totient is φ = 198508138.

The previous prime is 397016231. The next prime is 397016299. The reversal of 397016278 is 872610793.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99254068 + ... + 99254071.

It is an arithmetic number, because the mean of its divisors is an integer number (148881105).

Almost surely, 2^397016278 is an apocalyptic number.

397016278 is a deficient number, since it is larger than the sum of its proper divisors (198508142).

397016278 is a wasteful number, since it uses less digits than its factorization.

397016278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198508141.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 397016278 is about 19925.2673256847. The cubic root of 397016278 is about 734.9697045837.

The spelling of 397016278 in words is "three hundred ninety-seven million, sixteen thousand, two hundred seventy-eight".